Most Australian undergraduate degrees are 3 years, and more focused than the American style, without the "gen ed" requirements. You can take things like Medicine and Law directly as undergraduate degrees - there's no "pre-med" here. For most you can optionally take a further year to do honors, often research-focused.

Ironically, Melbourne University, one of the most prestigious Australian universties, has recently been moving to an American-style system with more generalist degrees at the undergrad level (eg there's no undergrad medicine there anymore).